Electric-light bulb.



PATENTED FEB. 1'2, 190?.

F. E. LERBERG.

ELECTRIC LIGHT BULB.

APPLICATION FILED MAR. 8, 1906.

INVENTOR ATTORNEY o UN TED STATES PATENT OFFICE}.

FRANK E.' LERBERG, OF NEWARK, NEW JERSEY.-

ELECTRIC-LIGHT BULB.

No. 343,900. I

Specification of Letters Patent.

Patented Feb. 12,1907.

Application fileri March 8, 1906. Serial No. 305,013.

T in whom it. may con/carry Be it'known that I, FRANK E. LERBERG, a citizen of the United States, residing at Newark, in thecountyof Essex and State of New Jersey, haveinvent-ed certain new and useful Improvements in Electric-Light Bulbs; and

. I do hereby declare thefollowing to be a full,

clear, and exact-description of the invention, such as will enable others skilled in the art to which itvappertains to make and use thesame,,reference being had to the accompanying drawing, and to letters of reference marked thereon, which form apart of this specification; .T

This invention relates to animproved electric-light bulb, andrefers more particularly,

to a'fastening' means for attaching the bulb to a suitable support,.- and is particularly 1 adapted to secure the bulb by means of a pin which is secured to the bulb. i

The invention is further designed to pro vide a stem for electricrlight bulbs that se- .curely grips the [fastened pin and also provides a sure, inc ans for supporting the fila- Inent. This construction makes a double seal on the stem part of the bulb that insur'es a vacuum. The lIlVGIii'JIOIl is illustrated lngthe accompanying drawing, in which 10 is abulb of the usual electric-light construction, except as to stem The stem 1 1 is sealed at its inner end, as at 12-, this inner sealed end serving to support'the' wires 13, these in turn supporting the filament 14. The outwardly projecting end of thestem 11' is sealed, as at 15, this seal securely encompassing the wires a of the lighting-circuit and also embraces the pin 16; This pin is preferably made as shown, being simply pointed, and is used by workmen when doing different kinds of work, such as jewelers or carpenters, and so it can be stuck into a WOIk beIlCh at places best suited to the work at hand. The withdrawaland replacing of the lamp is a simple matter, as there is end sealed and supporting a filament, and-a pin secured to the sealed stem. r c V 2.'An article of the kind described comprising a bulb, having a neck, a hollow glass outer end of the stem secured inlthe neck and projecting from the lamp, a seal cnt-he inner end of the stem,

circuit-wires extending through the aforesaid seal, a filament supported on the wigs, a seal on the end. of the stem projecting from the lamp and encompassing the aforesaid cir-o cuit-wires, anda pin embedded in the seal on the outer end of the stem. v v In testimony that I claim the foregoing I have hereunto set my hand February, 1906.

Witnesses:

WM. 'H. OAMFIELD, E. A. PELL.

5 FRANK LERBERG. 

